When backing up a vehicle, the most dangerous mistake you can make is relying solely on your rearview camera or mirrors. While modern technology is incredibly helpful, every camera has blind spots, especially for low-lying objects or fast-moving pedestrians and pets approaching from the side. You should never "blindly" reverse without first performing a physical "walk-around" of the vehicle if you are in a high-risk area like a driveway where children might be playing. Additionally, you should never reverse at a high speed; the steering physics of a car are different in reverse, making it much easier to over-correct and lose control. Another critical "never" is shifting into reverse while the vehicle is still moving forward, which can cause significant damage to the transmission. Finally, you should never assume that other drivers or pedestrians see you; always keep your foot "covering" the brake and be prepared to stop instantly. In professional driving, the rule is "GOAL"—Get Out And Look—before you even engage the gear, ensuring that the path is clear of obstacles that mirrors might miss.